package com.home.config;

import org.springframework.core.convert.converter.Converter;
import org.springframework.stereotype.Component;

import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;

/**
 * @program: business_needs
 * @description: 日期类转换
 * @author: chenxf
 * @create: 2018-11-01 10:49
 **/
@Component
public class DateConverterConfig implements Converter<String, Date> {

  private static final List<String> formarts = new ArrayList<>(4);
  static{
    formarts.add("yyyy-MM");
    formarts.add("yyyy-MM-dd");
    formarts.add("yyyy-MM-dd hh:mm");
    formarts.add("yyyy-MM-dd hh:mm:ss");
  }

  @Override
  public Date convert(String source) {
    String value = source.trim();
    if ("".equals(value)) {
      return null;
    }
    if(source.matches("^\\d{4}-\\d{1,2}$")){
      return parseDate(source, formarts.get(0));
    }else if(source.matches("^\\d{4}-\\d{1,2}-\\d{1,2}$")){
      return parseDate(source, formarts.get(1));
    }else if(source.matches("^\\d{4}-\\d{1,2}-\\d{1,2} {1}\\d{1,2}:\\d{1,2}$")){
      return parseDate(source, formarts.get(2));
    }else if(source.matches("^\\d{4}-\\d{1,2}-\\d{1,2} {1}\\d{1,2}:\\d{1,2}:\\d{1,2}$")){
      return parseDate(source, formarts.get(3));
    }else {
      throw new IllegalArgumentException("Invalid boolean value '" + source + "'");
    }
  }

  /**
   * 格式化日期
   * @param dateStr String 字符型日期
   * @param format String 格式
   * @return Date 日期
   */
  public  Date parseDate(String dateStr, String format) {
    Date date=null;
    try {
      DateFormat dateFormat = new SimpleDateFormat(format);
      date = dateFormat.parse(dateStr);
    } catch (Exception e) {

    }
    return date;
  }

}

